800V breakdown — headroom for universal input and surge
The 800V drain-source breakdown voltage on the integrated MOSFET provides primary-side switch margin for universal AC input plus reflected voltage and leakage-inductance spikes. A 50% duty cycle limits primary on-time.
77 W at 52 kHz — sizing the transformer and bulk cap
The 77 W power rating defines output capability for a continuous-load flyback. At 52 kHz, the transformer core volume and turns ratio are sized for this power level.
Protection set and thermal range
Built-in fault protection covers current limiting, overload, over-temperature, and over-voltage for adapter-type supplies without an external supervisor.